complibs/cloog: fix linking with libm

In Ubuntu 11.04 and 11.10, the default options for ld have changed.
--no-copy-dt-needed-entries and --as-needed are now enabled by default, which
causes errors like:

[EXTRA] Checking CLooG/ppl
[DEBUG] ==> Executing: 'make' '-j3' '-s' 'check'
[ALL ] Making check in .
[ALL ] config.status: creating include/cloog/cloog-config.h
[ALL ] config.status: include/cloog/cloog-config.h is unchanged
[ALL ] libtool: link: i686-build_pc-linux-gnu-gcc -Wall -fomit-frame-pointer
-pipe -o cloog cloog.o -L/<snip>/build/static/lib ./.libs/libcloog.a -lm
/<snip>/build/static/lib/libppl_c.a /<snip>/build/static/lib/libpwl.a
/<snip>/build/static/lib/libppl.a /<snip>/build/static/lib/libgmpxx.a
/<snip>/build/static/lib/libgmp.a -lstdc++
[ALL ] /usr/bin/ld: /<snip>/build/static/lib/libppl.a(MIP_Problem.o):
undefined reference to symbol 'sqrt@@GLIBC_2.0'
[ALL ] /usr/bin/ld: note: 'sqrt@@GLIBC_2.0' is defined in DSO
/usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/libm.so so try adding
it to the linker command line
[ALL ] /usr/lib/gcc/i686-linux-gnu/4.6.1/../../../i386-linux-gnu/libm.so:
could not read symbols: Invalid operation
[ALL ] collect2: ld returned 1 exit status
[ERROR] make[2]: *** [cloog] Error 1
[ERROR] make[1]: *** [check-recursive] Error 1

See:
https://wiki.ubuntu.com/NattyNarwhal/ToolchainTransition

This patch fixes these errors by placing '-lm' at the right place on the command
line as libppl requires libm when linking cloog.

Signed-off-by: "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>

 #!/bin/sh

 repos="$1"

 pdir="$2"

 if [ -z "${repos}" -o ! -d "${repos}" -o -z "${pdir}" -o ! -d "${pdir}" ];then

     printf "Usage: ${0##*/} <repos_dir> <patch_dir>\n"

     exit 1

 fi

 pdir="$( cd "${pdir}"; pwd)"

 version="$( echo "${pdir}" |sed -r -e 's,.*/([^/]+)/*$,\1,' )"

 branch="${version%.*}"

 n=$( ls -1 "${pdir}" 2>/dev/null |wc -l )

 r1="$( hg -R "${repos}" log -b "${branch}"  \

        |awk '

             $1=="changeset:" {

                 prev=rev;

                 split($2,a,":");

                 rev=a[1];

             }

             $0~/^summary:[[:space:]]+'"${branch}: (bump|update) version to ${version}\+hg"'$/ {

                 printf( "%d\n", prev );

             }

             '

      )"

 i=0

 hg -R "${repos}" log -b "${branch}" -r "${r1}:tip" --template '{rev}\n'    \

 |while read rev; do

     p="$( printf "%03d" ${i} )"

     i=$((i+1))

     if [ $( ls -1 "${pdir}/${p}-"*.patch 2>/dev/null |wc -l ) -ne 0 ]; then

         continue

     fi

     plog=$( hg -R "${repos}" log -r ${rev} --template '{desc|firstline}\n'  \

             |sed -r -e 's,[^[:alnum:]],_,g; s/_+/_/g;'                      \

           )

     pname="${p}-${plog}.patch"

     printf "Revision '%d' --> '%s'\n" ${rev} "${pname}"

     hg -R "${repos}" diff -c ${rev} --color=never >"${pdir}/${pname}"

     pdate="$( hg -R "${repos}" log -r ${rev} --template '{date|isodate}\n' )"

     touch -d "${pdate}" "${pdir}/${pname}"

 done